GENERAL AND ECONOMIC GEOLOGY 299 



Small, June, 1914. — In his report to the Inspectoria de Obras Contra 

 as Seccas, publicacao number 32, on the geology and nndergroimd waters 

 of Pianhy, etcetera, Mr. H. L. Small gives a geologic map of the eastern 

 and northern parts of the State of Piauhy. It is on a scale of 1 to 

 1,000,000 and shows seven geologic subdivisions. The map does not in- 

 clude the southwestern part of the state west of latitude 43 degrees, but 

 it does include the western portion of the States of Ceara and Per- 

 nambuco. The map is accompanied by sections showing the geologic 

 structure. 



Bibliography of the Geology of Piauhy 



Gustavo L. G. Dodt : Relatorio acerca da Exploragao do Rio Parnahyba por 

 ordem da Presidencia da Provincia de Piaub3\ Annexo "O" do relatorio 

 da Repartigao dos negocios da Agricultura, etc., pages 1-58. 4°. Rio de 

 Janeiro, 1872. Consideragoes geraes, pages 20-23. 



George Gaednee : Travels in the interior of Brazil, principally through the 

 northern provinces and the gold and diamond districts, during the years 

 1836-1841. xvi + 562 pages. London, 1846. Second edition, xviii + 428 

 pages. London, 1849. (Piauhy, pages 169-243.) ""^ 



M. A. R. Lisboa: Permian geology of northern Brazil. American Journal of 

 Science, May, 1914, volume 187, pages 425-443. 



H. L. Small: Geologia e supprimento d'agua subterranea no Piauhy e parte 

 do Cear^. Publicagao No. 32 da Inspectoria de Obras contra as Seccas. 

 Royal 8°, illustrated, maps, 147 paginas. Rio de Janeiro, Junho de 1914. 



Spix und Maetius : Reise in Brasilien, 1828, volume II, pages 770-809. 

 Miinchen, 4°, and Geographischer Anhang. 



Franciscus Ungee: Historia naturalis palmarum, Auctor, C. F. Ph. de Mar- 

 tius. Lipsise (1850?). I, Caput secundum. De palmis fossilibus, page 

 Ixx, tab. geol. I, figure 4, a fossil palm, Psaronius 'brasiliensis Brongn., 

 from the Province of Piauhy. 



J. W. Wells : Exploring and traveling three thousand miles through Brazil 

 from Rio de Janeiro to Maranhao. Two volumes. London, 1886. Occa- 

 sional geological notes. Appendix II, volume II : Extracts from a paper 

 read at a meeting of the Royal Geographical Society on the 8th of Feb- 

 ruary, 1886, and entitled "A sketch of the physical geography of Brazil," 

 pages 359-374. 



J. W. Wells : Notes of a journey from the River St. Francisco to the River 

 Tocantins and to the city of Maranhao. Journal of the Royal Geograph- 

 ical Society, volume XLYI, pages 308-328, map. London, 1876. 



RIO DE JA^^EIRO, THE FEDERAL DISTRICT, AXD TRINIDADE 



Previous investigations. — This territory includes the Federal District 

 and the island of Trindade. 



Almost every geological visitor to Brazil has stopped at Eio de Janeiro 

 and has had something to say about the geology in and about that city. 

 The geology, however, is rather monotonous and the notes usually begin 



